We run a couple of the oil-filled electric low profile heaters in our setup. It is really nice to have them on their own circuit and not worry about tripping a breaker killing other things we are using at the time.
Most of the time I have them set to their lowest heat zone and never adjust the thermostat higher than a #3 setting. One usually sets in the door way of our OFF-ROAD POPUP and the second one usually sets on a board in the unused tent bed area.
Whenever possible we most often have the two oil-filled heaters running off of a HD extension cord plugged into the camp ground unused 20AMP PEDESTAL connection. This connection is isolated from the camp ground 30AMP PEDESTAL connection on the same pole.
My sister and her hubby ran what you have in their trailer and it was really nice to run in the mornings first thing to get the floor warmed up good around their setting chairs drinking their first cup of morning coffee.. Most of time they just ran the flame display by itself to make one think it was was a nice warm fireplace. Worked pretty well actually doing that haha...
I had a portable version of one of those in my house and the cord was always running too hot. Finally burned up my house 120VAC receptacle so moved it to the garage storage after that...
Roy Ken